/*
 * Copyright 2021 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.wear.compose.material

import androidx.compose.foundation.progressSemantics
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.disabled
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.semantics.setProgress
import androidx.wear.compose.materialcore.RangeDefaults

internal fun Modifier.rangeSemantics(
    value: Float,
    enabled: Boolean,
    onValueChange: (Float) -> Unit,
    valueRange: ClosedFloatingPointRange<Float>,
    steps: Int,
): Modifier {
    val step = RangeDefaults.snapValueToStep(value, valueRange, steps)
    return semantics(mergeDescendants = true) {
            if (!enabled) disabled()
            setProgress(
                action = { targetValue ->
                    val newStepIndex = RangeDefaults.snapValueToStep(targetValue, valueRange, steps)
                    if (step == newStepIndex) {
                        false
                    } else {
                        onValueChange(targetValue)
                        true
                    }
                }
            )
        }
        .progressSemantics(
            RangeDefaults.calculateCurrentStepValue(step, steps, valueRange),
            valueRange,
            steps,
        )
}

internal fun IntProgression.stepsNumber(): Int = (last - first) / step - 1
